js 字符串截取下标
时间: 2023-10-16 13:11:17 浏览: 43
在JavaScript中,你可以使用charAt方法和substr方法来截取字符串的下标。charAt方法可以根据下标返回字符串中对应位置的字符,例如str.charAt(0)将返回字符串str中的第一个字符。另外,substr方法可以根据起始下标和长度来截取字符串中的一部分字符,例如stringObject.substr(start, length)将返回从start下标开始,长度为length的子串。所以,如果你想截取字符串的指定位置字符,可以使用charAt方法,而如果你想截取字符串的一部分字符,可以使用substr方法。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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